Support for masonry arches and the like.



J. MoMAHON. v SUPPORT FOR MASONRY ARCHES AND THE LIKE.

APPLICATION FILED AUG. 30, 1911.

Patented Mar. 11,1913.

vention is to provide a simple, strong and (p1 sca't JAMES McMAI-ION, oriviivv YORK, N. Y.

SUIP ORT OR MASONRY ARCHES AND THE LIKE.

Specification of Letters Patent.

Patented M in. 11, 1913.

Application filed August 30; 1911. Serial No. 646,854.

provide a temporary support of beams or scaffolding upon which the archfloor or the like of brick or hollow tile is laid, and when the brick ortile have set the support is removed, leaving the complete arch or floorin position with its ends takinginto the I-beams or iron girders at thesides of the room. .xDit'ticulty has heretofore been experienced insafely anchoring the seatfolding and providing suitable means forremoving the same after the need therefor is past, and the primaryobject of my ininexpensive support for the beams folding, which supportmay be rca t ily anchored infposition, and after the, arch or floor hasset may be removed, permitting the scaffolding to fall and the arch toremain in position.

The invention is illustratively exemplified in the accompanying drawing,wherein Figure 1 is a plan view of a skeleton iron structure adapted torecei e an arch or floor of brick or concrete, a plurality of myimproved supports being shown in position; Fig. 2 is a horizontalsectional view taken on the line 2-2 of Fig. 1; andtl ig. 3 is avertical sectional view taken on the line 3-3 of Fig. 2.

Stated in general terms, the invention includes a vertically adjustablesupporting arm for the sea olding or the like and means for supportingsaid arm from a firm part of the building in course of construc tion.

Stated in more specific terms, the invention embodies an elongated,preferably cylindrical rod or bar on which the supporting arm for thesca'llolding is longitudinally adjustable, there being also a platemovable on the bar and having a hook end adapted to engage the flange ofan I-beam or girder to hold the devicctirnny in suspended position.

Referring to thefaccon'ipanying drawing, and particularly tol igs. 2 and3 thereof, 10 designates a rod oribar,preferably cylindrilcal in form,and screw threaded near one end [10 to receive acorrespondinglyinternally threaded hand libld or handle 11. Adapted to be arrangedbelow/the handle 11 is an anchorage plate ,12 having the hooked end 13,the plate being/adapted to take over the flange of the I-bcam 14-. asshown in Fig. and hold the device firmly in suspended position.Near-tits opposite end the rod 10 is provided with )1 plurality oforifices 15 of a size to accommodate a cross-key or pin 1.6 such asshown in the uppermost of the series of orifices. The cross-key has anenlarged head 16 fto prevent its slipping through the orifices, and whenthe key is inserted in one or the orifices it projects at either side ofthe rod 10 and forms a stop for a hearing or supporting arm 17 havingupturned ends 17 and adapted to support the scaffolding upon which thehollow tile or brickwork is built. As shown in Fig. 2 of the drawing thearm 17 is really in the nature of a doubl sarm, the two branches thereofbeing connected by a boss 17* having formed therein an annular opening17 which connects with lateral elongated slots 17. In the form of deviceshown in Fig. 1, there is but a single supporting arm 17 for eachdevice. It will, of course, be understood that my invention contemplatesthe provision of either a single arm 17 or a double arm, as the case mayrequire.

The manner of using the invention is shown in Fig. 1. A series of theimproved supporting devices are. hung, by means of the plates 12, to theflanges of the I-beams 14. There is then laid across the supporting arms17 timbers 18 which serve to support the cross timbers 19, thesetwo'sets of timbers forming a scaffolding-on which the hollow tile orbrick work is built across the room and into the space between theflanges ot the I-bcams. After the tile or brick has set thescatlt'ilding is removed, and this may 'a suitable tool-that may be usedto turn the is provided to lower or raise the rod 10 into combinationwith a hooked plate adapted. take'over a fixed-v support, of a rodmovable 2o in said plate, means whereby said rod may be raised andlowered, in said plate, said rod having a plurality of perforations nearone end thereof, .a supporting arm independent of and slidable on saidrod, said so arm having therein a substantially annular opening andconnecting lateral slots, the annular opening in said arm being adapteto: engage said rod whereby said arm is revoluble about andlongitudinally movable 35 on said rod, said supporting arm havingopositely disposedupturned ends and a pin adapted to be inse'rted'insaid perforations to hold said arm in adjusted position on said rod.

In testimony whereof I have affixed my signature in presence of twowitnesses.-

JAMES MGMAHON. v

enable the rod to be turned, it is provided at its upper end withanorifice 15 ,to receive rod. After the arm 17 has been removed, thehandle 11 is turned on the thread 10 until the .rod l0 -drops out of thehandle; then the plate 12 is removed from the flange of: the I-beam, andthe several parts of the device may then be reassembled and installedfor'use in another place.

It will be understood that the purpose of the plurality of orifices 15is to provide means for adjusting the arm 17 vertically so as toaccommodate difierent thicknesses of scafioldin and varying thicknessesof brick or tile oors or arches. The handle 11 such position that the"arm 17 when loaded always stand straight, horizontally.

Havingthus described myinventio'n what I claim as new and desireto'secure by Letters Patent is In a'device of the character described,the

- 'Witnesses:'

MAURICE MHJ MET, O'r'ro MUNK.

